Mahurangi Island, also known as Goat Island, is located to the north-east of Hahei on the Coromandel Peninsula in New Zealand's North Island. The uninhabited island is 6 hectares in size.
Mahurangi Island forms one corner of the Te Whanganui-A-Hei (Cathedral Cove) Marine Reserve.
Nearby are many smaller islands including Okorotere and Te Tio Islands.